Process of making brake-shoes and product thereof.



e. T. BOND. PROCESS OF MAKING BRAKE SHOES AND PRODUCT THEREOF.

APPLXCATION FILED FEB-15.1917.

Patented May 22, 1917.

GEORGE '1. BOND, 0E HUNTINGTON, WES'1 VIRGINIA.

. PROCESS OF MAKING BRAKE-SHOES AND PRODUCT THEREOF.

Specification of Letters Patent.

Application filed February 15, 1917. Serial N 0. 148,870.

To all whom it may concern:

Be it known that I, GEORGE T. BOND, a citizen of the United States,residing at Huntington, in the county of Cabell and State of WestVirginia, have invented a certain new and useful Process of MakingBrake-Shoes and Product Thereof, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to the use of brakeshoes that have become worn inservice in the making of new shoes, and more particularly the inventionpertains to such use of worn shoes in substantially the form in whichthey are taken from the brake-heads, whereby the necessity of meltingthe worn. shoes for recovery of the metal thereof is avoided.

It is of common practice to remove shoes from service when only slightlymore than one-half the metal of the body th reof 13 worn away and toremelt them. This necessitates, not only the expense of renielting andremolding, but it also involves the considerable expense of labor due tomore frequent removals, of frequent handling in shipping from place ofremoval to place of melting, of accounting, and of varlous other itemsincident to a curtailed service.

In order to avoid these disadvantages, and in order to make use of wornshoes without substantial or expensive change in their form, thisinvention provides a process, for incorporating the worn shoes into newones, that can be practised without dlfliculty in car-repair plants withfacilities that easily can be installed and operated therein, and theinvention also is directed to the shoe so produced.

When read in connection with the description herein, the features of theinvention will be apparent from the accompanying drawing, forming partthereof, which is illustrative of the steps of the process and of thearticle produced.

While the disclosures herein now are considered to exemplify preferableembodiments of the invention, it is to be understood that it is not theintention to be limited necessarily thereto in interpretation of theclaims, as departures therefrom withln the limits of the claims can bemade w thout departing from the nature and spirit of the invention.

Like reference-characters refer to corresponding parts in the views ofthe drawings, of which Figure l is a side elevation of a partiallywornbrake-shoe in position to be pressed a against the face of, and intoassociation with, a new shoe;

Fig. 2 is a side elevation, partly in section, of a new and old shoepressed into interlocked association and constituting a unitary article;

Fig. 3 is a view of the back or keeper side of a brake-shoe; and

Fig. 4: is a view of the front or wearing side of a brake-shoe.

Referring more particularly to the drawing, A designates apartially-worn brakeshoe, the original contour of the wearing side ofwhich is indicated by a dotted line A, and B an unworn shoe.

Shoes of the type of that at the left of Fig. l are among thoseextensively in use on railway-cars. Such a shoe, as well as Patented May22, 1917.

that at the right of Figs. 1 and 2, includes a body portion 5, which hasa continuouslyourved wearing-surface conforming to the periphery of thesurface of the wheel against which it contacts, as indicated by thedotted line A, and a rear face substantially parallel therewith. Thebody portion may be formed partly or entirely of chilled metal, it mayhave inserts of any suitable material to increase the wearing andfriction qualities as commonly practised in the art, or it may be ofordinary gray or white cast iron, at the discretion of the maker anduser to meet the particular demands of the service to which it is to beput.

The shoe has one or more keepers 6, projecting backwardly from the sideopposite to the wearing-face, each to seat in a correspondingly-shapedrecess in a brake-head and thereby to hold the shoe in place thereon.The keepers are of malleable sheet steel, they are formed with legs 6and a connecting-piece 6 and they are provided with openings 7 formedthrough the legs and disposed in longitudinal series with respect to theshoe for reception of a securing-key (not shown) whereby the shoe isprevented from becoming displaced from the brakehead. In the type shownthe keepers are formed integrally of a back 8 by bending fromsheet-metal stock at intervals to dovetail shape, they extendtransversely of the shoe, and in manufacture the shoe-body is cast tothe back. The metal, during the process of molding, flows throughopenings 9 in the back, whereby connection of the parts is effected andreliably maintained. Moreover, in order to contribute to a reliablemaintenance of connection of the parts, the mold is so shaped that thebody metal extends slightly beyond the rear contour-line of the bodyagainst the inside of the legs of the keepers (as indicated at 5), thesurface between the legs lying in a curve the reverse of that of thecontour of the body (as indicated at .3) The keyways T andsecuringopenings 9 preferably are formed in the'stock before bending.

In order that a shoe, when it has become worn to such an extent that itis advisable to withdraw it from service (say to the place indicated bythe full line A in Fig. 1), may be embodied intact as a wearing memberand as a part of the wearing portion of another shoe, the inventionprovides for employment of the keepers that have been used to hold theshoe on a brake-head to hold the worn shoe on the other shoe.

For this purpose, the unworn shoe is formed in its body with one or morerecesses or motiscs 10 extending transversely thereof and opening to thewearing-face, the number of such recesses being the same as of thekeepers of the worn shoe, they are substantially the same width as thesekeepers, and they are arranged to have the keepers pressed into them,whereby the worn shoe is incorporated as a part of the unworn one.Usually the keepers are of the same width as the shoe-body, and,therefore, the mortises extend entirely across the shoehody and are openat the sides thereof. The end walls of each mortise overhang (asindicated at 10), and the bottom of the mortise bulges or curvesoutwardly between the ends (as indicated at 10"). Thus there is providedfor every keeper of the worn shoe a mortise of somewhat dovetail shape,hav ing comparatively deep pockets (as indicated at 10) under itsoverhanging walls. The depth of the recess at the center is the same asor slightly greater than the thick ness of the material. of the keepers,and the pockets are of sufficient extent and so located as to receive abend and two thicknesses of the material when bent back upon itself.

In order to secure a worn brake-shoe to an unworn one and thus to obtaina unitary article in which the unworn part of the used shoe constitutesa wearing member that is held against the wearing-face of the unwornshoe and is coextensive therewith and is employed until completely wornaway, the two shoes are placed in the relative positions shown by Fig. 1in a press or other suitable machine having suitable holding-dies and aram. The keepers are held 1n almement with and extend toward themortises of the unused shoe, which latter is held in fixed position. Theram is caused to press against the concave wearing-face of the used shoe(A) and that shoe thus forced toward the unused shoe (B). The ramcontinuing to advance, the malleable keepers of the worn shoe are forcedinto, and bent to conform to the shape of, the recesses or mortises 1.0,which latter are iust suihciently extensive to accommodate the materialof the keepers when bent to the shape and folded over into the pocketsthereof. The metal of the shoe-body projecting between the legs of thekeepers is accommodated by the mortises, this metal resting against whatwas the part that connected the legs of the keepers. Thus the keepersare shaped into tenons in the mortises and conform to the shape of andtightly fit in the mortises.

By the time the keepers are forced to shape in the mortises, the rearface of the worn shoe is brought against the contact face of the unwornshoe. The abutting faces of the two shoes being of the same contour,when pressed together they contact practically at all places between themortises and such contact is reliably maintained by the pressed-inkeepers until the old shoe is worn away, after which further wear istaken by the body of the newer shoe, which, after being worn to such anextent that it is advisable to withdraw it from service, may be attachedto a still newer shoe in the manner hereinbefore described. After thetwo shoes are pressed together, the ram is withdrawn and the articleproduced is removed from the press, when it is ready for use.

In a shoe having a plurality of keepers--- for example three in the typeshownthc keyways 7 through the legs of the end keepersusually extendinto the material connecting the legs (as indicated at 6), for it isadvisable to make the end keyways larger to facilitate insertion andremoval of the securing-key, because such keys may not always conformexactly to the curvature of the series of keyways. Thus, when the endkeepers are pressed into the mortises 10, a keyway-opening is at thebend in each pocket of the mortise and there constitutes a recess orseat. In order to prevent lateral ;lisplacement of the two shoes afterbeing pressed together, an abutment 10, formed integrally with theshoe-body, extends across the pockets in a position to be received bythe seat or recess afforded at the bend by what was the keyway-openinHaving thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A process of forming brake-shoes that includes the pressing of therear face of a brake-shoe having a keeper extending therelit) ' tise.

from into abutment with the contact-face of another brake-shoe having amortise opening to said face and at the same time by the same actionpressing said keeper into and causing it to conform to said mortise.

2. A process of forming brake-shoes that includes the pressing of therear face of a brake-shoe having malleable keepers extending therefrominto abutment With the contacting of another brake-shoe having mortisesdisposed in the same relative positions as said keepers, and by the sameaction pressing the keepers into and causing them to conform to saidmortises.

3. A process of forming brake-shoes that includes the formation of ashoe-body with a mortise opening to the contact face thereof, andthereafter. taking a brake-shoe having a rearwardly-extending malleablekeeper and pressing the rear face of said shoe into abutment with thecontact face of said body and by the same action pressing said keeperinto and causing it to conform to said mor- 4:. A process of formingbrake-shoes that includes placing a shoe-body having a mortise openingto the contact face thereof in fixed position in a press, placingabrakeshoe having a keeper on a ram of the press with its keeper inalinement with and extending toward said mortise, and then causing saidram to press said brake-shoe into abutment with said body and therebypressing the keeper into and causing it to con form to said mortise.

5. A process of forming brake-shoes that includes the pressing of therear face of a Copies of this patent may be obtained for five centseach, by addressing the brake-shoe having a fixed bendable keeperextending therefrom into abutment with the contact face of anotherbrake-shoe having a mortise of less depth than the keeper opening tosaid face, and at the same time by the same action pressing and bendingsaid keeper into and thereby causing it to conform approximately to theshape of said mortise.

6. A brake-shoe comprising a body having a transverse mortise opening tothe contact-face thereof, said mortise having at each .end anoverhanging wall and a pocket inside of said wall and an abutmentextending across said pocket, a wearing member abutting said contactface, and a tenon on said wearing member interlocked in said mortise andhaving a seat in which said abutment is disposed.

7. The combination of a brake-shoe body having a transverse mortiseopening to the contact face thereof, and another brakeshoe body abuttingsaid contact face and having as a permanent part thereof a malleablekeeper pressed into said mortise where by said bodies are held together.

8. The combination of a brake-shoe body having a mortise opening to thecontact face thereof, and another brake-shoe body abutting said contactface and having fixed thereto a malleable keeper pressed and deformedinto and thereby conforming approximately to the shape of said mortise,whereby said bodies are held together.

In witness whereof, I have affixed my signature.

enonon T. BOND.

"Commissioner of Patents,

Washington, D. C.

